正常睾丸显微镜下结构，生精小管中有大量的生殖细胞，支持细胞是难以觉察的。小的暗黑色长形精子在管中央能见到。
This is the microscopic appearance of normal testis. The seminiferous tubules have numerous germ cells. Sertoli cells are inconspicuous. Small dark oblong spermatozoa are seen in the center of the tubules.
